wiki: add Carbon Design System icons (2673) + pictograms (1000)

- 2673 SVG icons from @carbon/icons v11.82.0 (~2.5 MB)
- 1000 SVG pictograms from Carbon Design System (~2.0 MB)
- Updated 00-overview.md with asset structure and category listing

All icons: 32x32, fill: currentColor, optimized SVG
All pictograms: 24x24, fill: currentColor, SVG

assets/icons/carbon/drop-photo.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>drop-photo</title><path class="cls-1" d="M19,26a4,4,0,1,1,4-4A4.0045,4.0045,0,0,1,19,26Zm0-6a2,2,0,1,0,2,2A2.0021,2.0021,0,0,0,19,20Z"/><path class="cls-1" d="M27,29H11a2,2,0,0,1-2-2V18a2,2,0,0,1,2-2h3.2793l.5441-1.6324A2,2,0,0,1,16.7208,13h4.5584a2,2,0,0,1,1.8974,1.3676L23.7207,16H27a2,2,0,0,1,2,2v9A2,2,0,0,1,27,29ZM11,27H27V18H22.2792l-1-3H16.7207l-1,3H11Z"/><rect class="cls-1" x="27" y="11" width="2" height="2"/><rect class="cls-1" x="27" y="7" width="2" height="2"/><rect class="cls-1" x="27" y="3" width="2" height="2"/><rect class="cls-1" x="23" y="3" width="2" height="2"/><rect class="cls-1" x="19" y="3" width="2" height="2"/><rect class="cls-1" x="15" y="3" width="2" height="2"/><rect class="cls-1" x="11" y="3" width="2" height="2"/><rect class="cls-1" x="7" y="3" width="2" height="2"/><rect class="cls-1" x="3" y="3" width="2" height="2"/><rect class="cls-1" x="3" y="7" width="2" height="2"/><rect class="cls-1" x="3" y="11" width="2" height="2"/><rect class="cls-1" x="3" y="15" width="2" height="2"/><rect class="cls-1" x="3" y="19" width="2" height="2"/><rect class="cls-1" x="3" y="23" width="2" height="2"/><rect class="cls-1" x="3" y="27" width="2" height="2"/></svg>